My 1967 250sl is leaking gas near the front of the gas tank. The leak is coming from a part that is attached to the floor of the trunk and has three fuel pipes going into it and is separate from the gas tank. I have taken the part out and apart which contains a spring about 5 inches long and 1 inch in diameter. I don't know the name of the part but know the gasket is leaking. I am trying to identify the part so a new gasket can be ordered. Any help would be appreciated.